On Fri, Apr 19, 2013 at 05:41:03PM +0200, Stefan Behrens wrote:
> --- a/fs/btrfs/print-tree.c
> +++ b/fs/btrfs/print-tree.c
> +static void print_uuid_item(struct extent_buffer *l,
> + struct btrfs_uuid_item *ptr,
> + u64 item_size)
> +{
> + do {
> + u64 sub_item_type;
> + u64 sub_item_len;
> + u64 subvol_id;
> +
> + if (item_size < sizeof(*ptr)) {
> + printk(KERN_INFO "btrfs: uuid item too short!\n");
please print the expected and found sizes (also in (2) below)
> + return;
> + }
> + sub_item_type = btrfs_uuid_type(l, ptr);
> + sub_item_len = btrfs_uuid_len(l, ptr);
> + ptr++;
> + item_size -= sizeof(*ptr);
> + if (sub_item_len * 8 > item_size) {
For documentation purposes, I think using sizeof(u64) instead of 8.
> + printk(KERN_INFO "btrfs: uuid item too short (2)!\n");
> + return;
> + }
> +
> + item_size -= sub_item_len * 8;
> + switch (sub_item_type) {
> + case BTRFS_UUID_ITEM_TYPE_SUBVOL:
> + while (sub_item_len) {
> + read_extent_buffer(l, &subvol_id,
> + (unsigned long)ptr, 8);
> + printk(KERN_INFO "\t\tsubvol_id %llu\n",
> + (unsigned long long)
> + le64_to_cpu(subvol_id));
> + sub_item_len--;
> + ptr = (struct btrfs_uuid_item *)
> + (((char *)ptr) + 8);
and this could be wrapped in a macro or function, it's repeated several
times in that function.
> + }
> + break;
> + case BTRFS_UUID_ITEM_TYPE_RECEIVED_SUBVOL:
> + while (sub_item_len) {
> + read_extent_buffer(l, &subvol_id,
> + (unsigned long)ptr, 8);
> + printk(KERN_INFO "\t\treceived_subvol_id
> %llu\n",
> + (unsigned long long)
> + le64_to_cpu(subvol_id));
> + sub_item_len--;
> + ptr = (struct btrfs_uuid_item *)
> + (((char *)ptr) + 8);
> + }
> + break;
> + default:
> + printk(KERN_INFO "\t\tunknown type=%llu, len=8*%llu\n",
> + (unsigned long long)sub_item_type,
> + (unsigned long long)sub_item_len);
> + while (sub_item_len) {
> + read_extent_buffer(l, &subvol_id,
> + (unsigned long)ptr, 8);
> + printk(KERN_INFO "\t\tid %llu\n",
> + (unsigned long long)
> + le64_to_cpu(subvol_id));
> + sub_item_len--;
> + ptr = (struct btrfs_uuid_item *)
> + (((char *)ptr) + 8);
> + }
> + break;
> + }
> + } while (item_size);
> +}
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